| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.stanbol.enhancer.engines.entitycoreference.datamodel; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| import org.apache.stanbol.enhancer.nlp.model.Span; |
| |
| /** |
| * Encapsulates span and sentence information about a noun phrase. |
| * |
| * @author Cristian Petroaca |
| * |
| */ |
| public class NounPhrase { |
| /** |
| * The {@link Span} which represents this noun phrase. |
| */ |
| private Span chunk; |
| |
| /* |
| * TODO - should use Set instead? |
| */ |
| /** |
| * The {@link Span}s - tokens - which make up this noun phrase. |
| */ |
| private List<Span> tokens; |
| |
| /** |
| * The {@link Span}s contained in this noun phrase which represent Ners. |
| */ |
| private List<Span> nerChunks; |
| |
| /** |
| * The sentence index in which this noun phrase is found. |
| */ |
| private int sentenceNo; |
| |
| public NounPhrase(Span chunk, int sentenceNo) { |
| if (chunk == null) { |
| throw new IllegalArgumentException("Chunk cannot be null"); |
| } |
| |
| this.chunk = chunk; |
| this.tokens = new ArrayList<Span>(); |
| this.nerChunks = new ArrayList<Span>(); |
| this.sentenceNo = sentenceNo; |
| } |
| |
| /** |
| * Gets the chunk representing this noun phrase. |
| * |
| * @return |
| */ |
| public Span getChunk() { |
| return chunk; |
| } |
| |
| /** |
| * Adds a new token which is found in this noun phrase. |
| * |
| * @param token |
| */ |
| public void addToken(Span token) { |
| /* |
| * TODO - validate token boundaries within this noun phrase. |
| */ |
| tokens.add(token); |
| } |
| |
| /** |
| * Gets the list of tokens which make up this noun phrase. |
| * |
| * @return |
| */ |
| public List<Span> getTokens() { |
| return tokens; |
| } |
| |
| /** |
| * Adds a new NER chunk which is found within this noun phrase. |
| * |
| * @param chunk |
| */ |
| public void addNerChunk(Span chunk) { |
| /* |
| * TODO - validate NER boundaries within this noun phrase. |
| */ |
| nerChunks.add(chunk); |
| } |
| |
| /** |
| * Gets the list of NERs within this noun phrase. |
| * |
| * @return |
| */ |
| public List<Span> getNerChunks() { |
| return nerChunks; |
| } |
| |
| /** |
| * Determines whether this noun phrase's {@link Span} contains the given {@link Span}. |
| * |
| * @param span |
| * @return |
| */ |
| public boolean containsSpan(Span span) { |
| return (span.getStart() >= chunk.getStart() && span.getEnd() <= chunk.getEnd()); |
| } |
| |
| /** |
| * Determines whether this noun phrase has NERs. |
| * |
| * @return |
| */ |
| public boolean hasNers() { |
| return nerChunks.size() > 0; |
| } |
| |
| /** |
| * Returns the sentence index in which this noun phrase is found. |
| * |
| * @return |
| */ |
| public int getSentenceNo() { |
| return this.sentenceNo; |
| } |
| |
| public int hashCode() { |
| final int prime = 31; |
| int result = 1; |
| result = prime * result + chunk.hashCode(); |
| result = prime * result + tokens.hashCode(); |
| result = prime * result + nerChunks.hashCode(); |
| |
| return result; |
| } |
| |
| public boolean equals(Object obj) { |
| if (this == obj) return true; |
| if (obj == null) return false; |
| if (getClass() != obj.getClass()) return false; |
| |
| NounPhrase other = (NounPhrase) obj; |
| |
| return chunk.equals(other.chunk) && tokens.equals(other.tokens) && nerChunks.equals(other.nerChunks) |
| && sentenceNo == other.sentenceNo; |
| } |
| } |